Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss), including noncontrolling interests	$ (2,635)	$ 57,782	$ 17,007	$ 112,004
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on hedges arising during the period	3,346	(4,129)	(8,365)	(74)
Reclassification adjustments for loss included in net income (loss)	3,258	610	4,931	1,268
Income taxes on unrealized (gain) loss on hedges	(2,311)	1,232	1,202	(418)
Unrealized gain (loss) on hedges, net of tax	4,293	(2,287)	(2,232)	776
Foreign currency translation gain	15,889	6,931	2,020	8,278
Other comprehensive income (loss), net of tax	20,182	4,644	(212)	9,054
Comprehensive income			16,795	121,058
Less comprehensive income applicable to noncontrolling interests			0	(503)
Comprehensive income applicable to common shareholders	$ 17,547	$ 62,426	$ 16,795	$ 120,555